invaginate vs pervert

invaginate

verb
  • To turn or fold inwardly. 

  • To fold inward to create a hollow space where none had existed, as with a gastrula forming from a blastula. 

  • To fold up or enclose into a sheath-like or pouch-like structure, either naturally or as part of a surgical procedure. 

adj
  • Having one portion of a hollow organ drawn back within another portion. 

  • sheathed 

pervert

verb
  • To turn another way; to divert. 

  • To corrupt; to cause to be untrue; corrupted or otherwise impure 

  • to misinterpret designedly. 

  • To misapply, misuse, use for a nefarious purpose 

  • To become perverted; to take the wrong course. 

noun
  • A person whose sexual habits are not considered acceptable. 

How often have the words invaginate and pervert occurred in a corpus of books? (source: Google Ngram Viewer )